3. a. A person or company who reproduces or uses the work of another (as a book, recording, computer program, etc.) without authority and esp. in contravention of patent or copyright; a plagiarist. Also: a thing reproduced or used in this way.
The first quote it provides is from 1608. It also provides quotes from 1668, 1703, 1758, 1822, 1887, 1928, and 1996. I would consider a word in use for over 400 years to be "old", but that's just me.